This is a genuine JCB 90303226 O-Ring, an essential sealing component designed for a wide range of JCB agricultural, construction, and industrial machinery. Manufactured to OEM specifications, this O-ring ensures a reliable and tight seal, preventing leaks and maintaining optimal system pressure. With an outer diameter of 30mm, an inner diameter of 25mm, and a thickness of 2.5mm, it is engineered for precise fitment and durability in demanding operating conditions across numerous JCB models including Backhoe Loaders, Loadalls, Excavators, and Fastrac Tractors.